All,
Can I drive a 6v DC motor with a 12v battery by using PWM and a 50% (or
less) duty cycle?  How will this affect the life of the motor?

Is there a rule of thumb for the frequency to use?  I was going to use a
PIC for control and the timer overflow interrupt, thus giving a frequency
of 4 KHz.  Does this seem reasonable or should the frequency be higher or
lower (in general).

By the way the motors in question are from a kids sidewalk car and I'm
sure are just standard DC motors (not the newer coreless motors).

Thanks,
Adam

Adam Bryant (age 0x23)
abryant@peaktech.com (work)
adamdb@juno.com (home)
Parker, CO, USA
Robotics, RC Airplanes, anything using a PIC

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